Knotter



KNOTTER.

APPLICATEON FILED ocnzs, 1920.

1 ,388,553, I Patented Aug. 23, 1921.

A Z Z 67 i .Z' C1 62 726%?) m,

M Add ALBERT EARL GRANSTON, 0F SPOKANE, WASHINGTON.

KNO'ITER.

Specification of Letters Patent.

Patented A110. 23, 1921.

Application filed October 29, 1920. .Serial No. 420,519.

1 0 w ll 7.0 710m it may concern I Be it known that I, Amnnrr EARL CRAN- s'roN, a citizen of the United States, and a resident of Spokane, in the county of Fipokane and State of \Vashington, have 1nvented certain new and useful Improvements in Knotters, of which the followlng is a specification.

My inventioiji relates to knotters used for twistino; the severed ends of a loop of wlre subsequent to the wrapping of a bundle of shingles, Sl'ilV'OS or the like for securing the same together for shipment, and it content plates certain new and useful improvements in the knotter embodied in my pendlng application Serial No. 322,086, filed September A purpose of my invention is theprovision is? a. knotter which positively grips the wire ends in advance oi. the cutting operation thereby eliminating the possibility oi the severed wire ends slipping from the knottcr duringthe twisting operation.

It is also a purpose of my invention to provide a knotter including a movable memher and a stationary member, the former being formed with a recess oi? a predetermined depth to accommodate wires ot a predetermined gage so that the confronting faces of the two members will securely grip wires during movement of the movable member, thereby eliminating the employment of a gripping lug, and consequently reducing the cost of manufacture of the knotter.

A further purpose of my invention resides in the provision of a knotter having means :for allowing; the ready withdrawal of the twisted wire ends from the knotter upon completion oi. the twisting operation, and. in such manner as to permit of the wire ends retaining their angnilar bent positions.

T will describe one form of knotter embodying my invention and will. then point out the novel features thereof in claims.

In the accompanying drawings:

l ig'ure 1 is a view showing; in top plan one form of knotter embodying my invention.

Fig. 2 is a view similar to Fig. 1 showing the knotter as having been slightly revolved.

Fig. 3 is a view showing in side elevation the knotter shown in the preceding views, with the parts oithe knotter in the position shown in F ig. 1.

F ig. 4; is a fragmentary vertical sectional]. view taken on the line 4-4 oi? Fig. 2.

Fig. is 1. horizontal sectional view talicen on the line 55 of F ig. 4. y

Fig. 6 is a vertical. sectional view taken on the line 6-6 of Fig. 5.

Fiimilar reference characters refer to similar parts in each of the several views.

.l-tehcia'in g spec" cally to the drawings and particularly to F 3, S designates an oper atingr shaft to which is fixed for rotation therewith an upper disk D, a lower disk D", and a stationary disk D loosely embracing the shaft and interposed between the movable disks. C designates acollar which is slidably fitted upon the shaft S and urged upwardly in the direction of the disk D by means oi a coilspring The collar C bears against a plate P supported for vertical movement upon the disk D by a pin N.

The knotter as thus far described is similar in construction to the knotter embodied in my pendingapplication heretofore referred to so that a showing of the means for rotating the shaft S to effect an actuation of the knotter, as well as the means for securing the disks D and D to the shaft, is believed to be unnecessary.

The upper disk D is provided with a wire receiving slot designated at 15 which communicates at its inner end with a positioning recess 16 formed. in the upper end of the shaft S. The left end wall of the slot 15 is provided with a projection 15 for a purpose which will be hereinafter described. The lower or inner side of the disk D is formed with a recess 16 which, as clearly shown in F ig. L, communicates at one end with the slot 15. This recess 16'' is of a pro determined depth so as to accommodate wires of predetermined age.

The stationary disk D also provided with a slot 17 which is of the form shown in Fig. 5. The lower edge of the right hand wall of the slot 17 is formed to provide a cutting edge 17, which as shown in Fig. 4 is adapted to cooperate with a cutting edge 18 formed on the left hand wall of a slot 18 formed in the lower movable disk D. As shown in Fig. 5, the confronting sides of the slots 17 and 18 are formed with reversely curved edges so as to effect a shearing action between the cutting edges 17 and 18 when the disk D is rotated with respect to the disk D As shown in Figs. 5 and 6, the

7 upper side of the disk D is formed with a shallow recess 19. at a point adjacent to the slot 17. This recess 19 is adapted to effect a release of the ends of a loop of wire subsequent to the twisting operation as will be hereinafter described. Y

In operation, the three disksof the knotter normally occu y the position shown in Figs. 1 and 3, in w ich position the slots 15, 16, 17 and 18 are in registry to permit of the insertion of theends of a loop of wire into the knotter and the insertion or threading of one of the wire endsbetween the lower movable disk D and the plate P. When the shaft S rotates to effect the rotation of the disks D and D' in the direction of the recess, the projections 15 engage the wire ends and thus force the same into engagement with the upper edge of the right hand wall of the slot 17 thereby causing a right angular bending ofthe wires into the recess 16, it being understood that, as previously described, the disk D is stationary. As previously explained, the recess 16? is of a depth to accommodate wires of predetermined gage so that when they have been inserted into the recess, further movement of the disk D will cause the recess to be completely disalined as with respect to the slot 17 causing a coaction between the confronting faces of the disks D and D to securely grip the wires therebetween. V V

As the lower movable disk D moves with the upper disk D, it will be clear that after the bending of the wire ends has been effected by the projection 15, the cutting edges 17 and 18 engage the wire ends and thus sever the latter. It is to be particularly noted that this cutting operation occurs subsequent to the bending operation so that the angular bent portions of the wire ends are automatically moved into the recess 16' upon continued movement of the disk D.

With the angular bent wire ends disposed within the recess 16, continued rotation of the disk D causes a twisting of the wires in a manner which will be readily understood. When the twisting operation has been completed, the angular bent ends of the wire ends move into the recess 19, and because'of the contour of the latter it will be clear that when a. pull is-exerted upon the wire ends they will be readily removed from between the disks D and D and in such manner as to permit of the wire ends retaining their angular positions. This retention of the angular bent ends of the wire ends serves to maintain the wire ends in twisted position.

The automatic threading or insertion of the wire supply end between the disk D and the plate P will be readily understood from a consideration of the description and operation of the knotter embodied in the aforesaid pending application.

From the foregoing operation, it will be clear that the bending and gripping of the wire ends occurs prior to the cutting operation thereby eliminating the danger of the severed, wire ends slipping out of the knotter and thus permitting of the successful twisting of the ends. It will also be clear that as the recess 16 is cut to a depth having a certain fixed relation with the diameter of the particular wire used, a gripping of the wire ends will be effective without the employment of the lug. This allows the cost of manufacture to be decreased to an appreciable degree as with the present construction it is only necessary to turn the recess out on a lathe while when the lug was used it was necessary to chisel out the recess adjacent the lug.

Although I have herein shown and described only one form of knotter embodying my invention, it is to be understood that various changes and modifications may be made herein without departing from the spirit of the invention and the spirit and sco e of the appended claims.

hat I claim is:

1. A knotter comprising, a stationary member and a movable member, means carried by the movable member and cooperating with the confronting face of the stationary member for receiving the two ends of a wire, bending and gripping the same between the members so that they will move with the movable member to effect a twisting of the wire and an ultimate releasing thereof in a manner to maintain the ends bent.

2. A knotter comprising, a stationary member and a movable member, means carried by said members for receiving the two ends of a wire, bending and twisting the same between the members so that the will movewith the movable member to e ect a twisting of the wire ends with an ultimate releasing thereof in a manner to maintain the ends bent, and a second movable member associated with the stationary member to effect a cutting of the wire ends subsequent to the gripping operation.

3. A knotter comprising, a stationary member and a movable member, means carried by said members for receiving the two ends of a wire, bending and twisting the same between the members so that the will move with the movable member to e ect a twisting of the wire ends with an ultimate releasing thereof, and a second movable member associated with the stationary member to effect a cutting of the wire ends subsequent to the gripping operation.

4. A knotter comprising, a stationary member and a movable member, means carried by said members for receivi the two ends of the wire, bending and twisting the same between the members so that they will move with the movable member to efiect a twisting of the wire ends with an ultimate releasing thereof, a second movable member associated with the stationary member to effect a cutting of the wire ends subsequent to the gripping operation, and a plate urged toward one of the movable members and coacting therewith to frictionally hold one of the cut ends of the wire within the knotter when said movable member is moved.

5. A knotter comprising, a pair of movable members, a stationary member between the movable members, means for rotating the movable members, all of the members being formed with wire end receiving slots with certain of the walls of certain of the slots coacting to effect a bending of the wire ends, and other walls of the slots coacting to effect a cutting of the Wire ends subsequent to the bending operation, a recess formed in one of the movable members to receive the bent ends and to cause the stationary member to coact with the said movable member to grip and twist the wire ends, and a recess formed in the stationary member to ei'l'ect a release of the wire ends subsequent to the twisting operation.

6 A knotter comprising, a pair of movable members, a stationary member between the movable members, means for rotating the movable members, all of the members being formed with wire end receiving slots with certain of the walls of certain of the slots coacting to effect a bending of the wire ends, and other walls of the slots coacting to effect a cutting oil? the wire ends subsequent to the bending operation, a recess formed in one oi the movable members to receive the bent ends and to cause the stationary member to coact with the said movable member to grip and twist the wire ends, and a recess formed in the stationary member to effect a release oi. the wire ends subsequent to the twisting operation in a manner to maintain the wire ends bent.

ALBERT EARL CRANSTON. 

